Canon FA-DC58C 58mm Filter Adapter for PowerShot G1 X. The Canon FA-DC58C is a 58mm lens filter adapter for the PowerShot G1X. It attaches directly to the lens barrel ring and also allows to use of 58mm lens filters such as a Circular Polarizer, Neutral Density, MC Protector and UV filter for a range of creative effects. Vendor Part # 5971B001